Question
Using compatible numbers, which number is the best estimate of 72.67 รท 7.8?
A) 8
B) 9
C) 10
D) 11
A) 8
B) 9
C) 10
D) 11
Answers
GPT-4o mini
To solve \( 72.67 \div 7.8 \) using compatible numbers for estimation, we can round the numbers to easier values that are close to the original values.
1. Round \( 72.67 \) to \( 70 \).
2. Round \( 7.8 \) to \( 8 \).
Now, perform the division using these compatible numbers:
\[
70 \div 8
\]
To simplify \( 70 \div 8 \):
\[
70 \div 8 = 8.75
\]
Since \( 8.75 \) is closest to \( 9 \), the best estimate for \( 72.67 \div 7.8 \) is:
**B) 9**
1. Round \( 72.67 \) to \( 70 \).
2. Round \( 7.8 \) to \( 8 \).
Now, perform the division using these compatible numbers:
\[
70 \div 8
\]
To simplify \( 70 \div 8 \):
\[
70 \div 8 = 8.75
\]
Since \( 8.75 \) is closest to \( 9 \), the best estimate for \( 72.67 \div 7.8 \) is:
**B) 9**